Peel the ClemenGolds carefully, removing as much pith as possible. Then slice the fruit whole into 5mm slices and arrange prettily onto a platter.
Add the sugar and water to a small saucepan (try not to have any sugar crystals on the sides of the saucepan, as it will crystallise) and then place on a high heat. Bring to the boil, and keep on a rolling simmer until it turns a medium golden brown. Do not stir the pan, just swill it around now and again to spread the colour.
When it has reached its golden hues, take off the heat and cool for 3 minutes. Please note that when it starts changing colour it will go really quickly, so watch it. It will also be incredibly hot, so be careful!
When it has cooled off a little, drizzle it over the ClemenGolds and let it set, then sprinkle with mint and pistachios and serve.